import * as postcss from 'postcss';
import { NodeProps } from '../../node';
import type * as sassInternal from '../../sass-internal';
import { AnyIfConditionExpression, IfConditionExpression, IfConditionExpressionProps } from './index';
import { IfEntry } from '../if-entry';
/**
 * The set of raws supported by {@link IfConditionNegation}.
 *
 * @category Expression
 */
export interface IfConditionNegationRaws {
    /** The exact formatting of the `not` keyword. */
    not?: string;
    /** The whitespace between the `not` and the condition. */
    between?: string;
}
/**
 * The initializer properties for {@link IfConditionNegation}.
 *
 * @category Expression
 */
export interface IfConditionNegationProps extends NodeProps {
    raws?: IfConditionNegationRaws;
    negated: AnyIfConditionExpression | IfConditionExpressionProps;
}
/**
 * A negated condition in an `if()` condition.
 *
 * @category Expression
 */
export declare class IfConditionNegation extends IfConditionExpression {
    readonly sassType: "if-condition-negation";
    raws: IfConditionNegationRaws;
    parent: IfEntry | AnyIfConditionExpression | undefined;
    /** The negated condition. */
    get negated(): AnyIfConditionExpression;
    set negated(negated: AnyIfConditionExpression | IfConditionExpressionProps);
    private _negated?;
    constructor(defaults: IfConditionNegationProps | AnyIfConditionExpression | IfConditionExpressionProps);
    /** @hidden */
    constructor(_: undefined, inner: sassInternal.IfConditionNegation);
    clone(overrides?: Partial<IfConditionNegationProps>): this;
    toJSON(): object;
    /** @hidden */
    toJSON(_: string, inputs: Map<postcss.Input, number>): object;
    /** @hidden */
    toString(): string;
    /** @hidden */
    get nonStatementChildren(): ReadonlyArray<AnyIfConditionExpression>;
}